A(n) ____________ is a method with no body that appears in a base class, and must be overridden in a (non-abstract) derived class.

Java supports ________; collections of related methods that typically enable you to tell objects what to do, but not how to do it (we’ll see an exception to this in Java SE 8).

a. classes b. subclasses c. superclasses d. interfaces

A class that is able to inherit from more than one class utilizes what C# feature?

A. polymorphism B. interfacing C. collaboration D. multiple inheritance